Nothing until he was 16 months, then I had morning sickness and we discovered In the Night Garden. So he was watching about an hour a day? He wasn't a happy boy though If he watches it more than once or twice a week then he gets narky. We stick to Play School and Thomas, but we tend to watch it with him and clap along and talk about the characters and stuff. I don't feel guilty about using it, I know the consequences and the reasons why I did/do it.